Fuel-feed device



L. GUICHARD FUEL FEED DEVICE Filed Dec. 27, 1925 Ira- .221121 Patented Mar. 17, 1925.

UNITED STATES LOUIS GUICHABID, 0F PARIS, FRANCE.

FUEL-FEED DEVICE.

Application med December 87, 1923. Serial No. 688,072.

To all whom it may concem:

Be it known that I, LOUIS Gmonanmpf 1 Avenue Peterhof, Paris, France, have mvented a Fuel-Feed Device, of which the following is a full, clear, and exact description. Y

The present invention relates to fuel feeding devices in which use is made, for elevating a liquid of the partial vacuum existing in a pipe line. This apparatus is mainly applicable to motor vehicles: it then serves to elevate the fuel contained in a tank arranged at any level for bringing it at a point situated at a higher level than the'carburetor.

The apparatus forming the sub ect-matter of the invention is essentially characterlzed by the fact that it comprises, as movable parts ensuring its operation, only the usual float and a tube-piston, mounted, withsome play, in the axis of the said float which determines the displacement of this 'tube-plston sometimes upwardly and sometimes downwardly, for producing, at suitable moments, the opening or the closing of the various orifices provided for the working of the device. This arrangement, which is remarkably simple, allows therefore the .doing away with all delicate arts capable of getting out of order, such as evers, needle valves, springs, rocking valves etc.

The accompanying drawing diagrammatically illustrates, in vertical section through the axis, a form of construction, given y way of example, of the apparatus forming the subject-matter of the invention.

As shown in the drawing, the apparatus comprises a vessel 1 arranged in the feeder 2 to the upper wall of which it -is secured.

On this wall is. mounted, on the outer side, a cylinder 3 open at its lower part and on the head of which is secured a pipe 4 connected to a suitable point of the suction pipe of the engine (or, generally speaking, to a closed space in which exists a sufiicient partial vacuum) on the lower wall of the vessel 1 is secured another cylinder 5 arranged exactly in alignment with the cylinder 3.

I In the wall of the upper c linder 3 are provided, at a level determine 'a's indicated hereafter, one or more orifices 6 opening in the atmosphere; the said cylinder'communicates through the conduit 7 with the interior of the vessel 1, The lower cylinder 5 is also perforated with a number of orifi'ces 8. v

' In the vessel 1 can move a float 9 perforated, according to its axis with a hole 10 in which fits, so as to be capable of freely moving, a tube piston 11 provided throughout its height with large openings, as illustrated'at 12 in the drawing. on this tube are secured, at the upper part, a piston 13 and, at the lower part, a slide valve or' ring 14; both parts 13 and 14 move with'slig'ht friction, the piston 13 in the cylinder- 3, the slide 'valve or ring 14 in the cylinder. 5.

It is to be understood that the iston 13 and the slide valve or ring 14 could away with the tube 11 (which must, of course, in this case, be closed at its upper end) then constituting the piston in the upper cylinder;

0n the 'tube 11, at suitably determined points'of its length, are secured two abutments 15 and 16 arranged on either'side of the float.

' A-pipe 17 feeds,'in the vessel of the appabe done ratus, the liquid to be elevated which comes from a tank situated at any point; finally,

from the bottom of the feeder 2 extends a.

gipfe 58 leading to the apparatus which is to e. e v The operation of the device which has just been described is as follows:

Supposing the system is in the position illustrated in the figure: the float 9.rests on the lower abutment 16 of the tube 11; the slide valve 14 closes the orifices 8, whilst the piston 13 uncoversthe orifice through which the channel 7 opens in the cylinder 3, ob-

turating at the same time the orifice 6 com-Q municatifig with the atmosphere. 1 In this position the interior of the vessel 1 communicates, through the channel 7 and pipe 4,

with, the closed space in which exists the partial vacuum. Under, the action of this a partial vacuum, the liquid is sucked in the tank through the pipe 17 and it flows into the vessel 1. In proportion to the arrivel of. the liquid in the ,vessel 1, the float rises abutment 15. I

During all this phase of the operation, the upper plston 13 is in e uilib'rium as far as the ressure is concerne since its two faces are 0th subjected to partial vacuum.

until it comes in contact with the upper The liquid continuing to flow into the ves= 'sel 1, the float continues to rise and, in its movement, it ushes the tube 11, by acting on the upper a utment 15, until the orifice 6 is uncovered. At the same moment the upper orifice of the channel 7 is obturated by the piston 13, the position of the sald OIlfices being determined in such a manner that, when the lower edge of the piston comes level with the lower edge of the orifice 6, the upper edge of the said piston comes level with or has just passed by the-upper'edge of the orifice of the channel 7. Consequently, when the opening of the orifice 6 begins, the channel 7 is closed. The interior of the vessel 1 bein then at atmospheric pressure, the liquid in e tank ceases to be sucked through the pipe 17 and the flow of this llqllld into the vessel 1 is interrupted.

At this moment, the equilibrium of pressure to which the piston 13 was subjected, is broken, as its lower face communicates with theatmosphere, whilst its upper face remains subjected to the partial vacuum'ex- U isting in the pipe 4.. It results therefrom thatv the tube-piston is rapidly drawn up-' wardly and that the slide valve 14 uncovers the orifices 8; the liquid contained in the vessel 1 then flows out into the feeder 2, by

passing through the orifices 12 of the tube The float 9 descends, of course, with the level of the liquid until it rests on the lower abutment 16 and it remains in this position a certain time, although the level of the liquid continues to lower in the vessel, because the tube-piston is retained by the partial vacuum 7 acting upon its upper face. When, the liquid continuing to flow out through the orifices 8, the weight of the float succeeds in overcomin the artial vacuum exerted on the upper ace 0 the piston 13, the float descends, drawingalong the tube 11 with it. As soon as, during this movement,

sure is sudden y re-estabhshed on both faces of the upper piston 13: the tube descends suddenly under the action of the weight of the float and the slide valve 14 obturates the orifices 8. From this moment, the movable parts are again in the position illustrated in the drawing, the vessel'l is again in com} munication with the .pipe 4 and the suction of the liquid through the pipe 17 recommences.

this apparatus is such that the ori ces .6 and 7 can never be simultaneously open; consecationof the apparatus to internal combus-" tion engines, the fuel supplied to the feeder is ensured for all the speeds, of the engine.

element for feeding the fuel from the spaced stops, a float slidably mounted on said element and movable between said stops, a piston fixed to said element, a cylinder associated with the container and having a passageway for placing the interior of the container in communication with said conduit, said passageway opening into the cyl-- inderat one elevation, a port in the-cylm- .der arranged at a different elevation and adapted to place the interior'of the container in communication withthe atmosphere, said piston being movably mounted in the cylinder and arranged to control said port and.

passageway:

2. fuel feeding device as claimed in claim 1 in which the conduit is connected to the top of the cylinder and communicates with the upperend of the interior of the cylinder; 1

3. A fuel feeding device as claimed in claim 1 including a second container to receive the fuel from the first container, and means controlled by the vertically movable to the second'container.

4. A fuel feeding device as claimed in claim 1 in which the vertically movable element consists of a tube.- v

5. A fuel vfeeding device as claimed in claim 1 in which the verticall element consists of a perforate tube for q feeding fuel fromthe container. v the orifice 6 closed and. the orifice of the i channel 7 is 0 en, the-e uilibrium of pres- 6. A fuel feeding device as claimed in claim 1 including a second container, means movable for conveying fuel from the first to the sec- I ond 7.-A fuel feeding device including an having top'and bottom cylinders, ports in pipeconnected to the upper end of the uppercylinderand adapted to be connected to an en ine for creating suction in the upper qllliently, no loss of charge is to be feared m t e operation of the system and, in the appli cylin' er, a assageway placing the upper ;the bottom cylinder for passing fuel from v the inner container to the outer container, a It will be noted that the arran ement of portionoft e' upper cylinder in commumcation with the inner container, 9. port in the lower portion-of the uppercylinder for container; and a tubular part .controlled by thevertically movable element for *controlling the last mentioned means.

placing the interior of the inner container I in communication with the atmosphere, a pipe for feeding fuel into the inner con-;

tainer from a storage tank, a vertically movable perforated tube arranged partially within the inner container and having its ends extending into said cylinders, a piston on the upper end of the tube for controlling the port and passage way in the upper cylinder, a sleeve on the lower end of the tube for controllnig the ports in the lower cylinder, spaced stops arranged on the tube, and a float slidably mounted on said tube be- 10 tween said stops.

The foregoing specification of my improved exhauster signed by me this 7th day of December, 1923.

LOUIS GUICHARD. 

